Air-pump.



H. W. LOCKLEY.

AIR PUMP. APPLICATION FILED DEC.|6,1914.

Iatented May? 7 2 SHEETS--SHEET v Elnoanioao 1 W LOCKLEY Witnemo H. W.LOCKLEY.

Alfi PUMP.

APPLICATION FILED 05c. 16, 1914.

Patented May 2, 1916.

2 SHEETS-SHEET 2 H W- LOCKLE-Y Still anotherobject is to provide anecceni am .325.

I tun" arenas raarnnr HAIKRY W. LOCKLEY, L NEW CASTLE, PENNSYLVANIA,ASSIGNOR TO KELLOGG MANU- EACTURING COMPANY, OF ROCHESTER, NEW YGBK, ACOEPORATIOII OF NEW YORK.

Alli-YUM? Specification of Letters Patent.

Patented May 2, 1916.

Application filed'December 16, 1914. Serial Ho. 877,575.

To all whom it may concern:

Be it known that I, HARRY W. LocnLnr, a

v citizen of the United States, residing at New Castle, in the county ofLawrence and State of Pennsylvania, have invented certain new and usefulImprovements in Air-Pumps, of

' which the following a specification, refer.- Y ence being had'to theaccompanying draw- My invention relates to pumps, and particularly topumps designed to be used for the inflation of the tires of automobiles.

The primary object of my invention is the provision of a strong,durable, simple and yet highly effective air pump which may beeconomical to manufactureand in which the parts may be readily assembledor disassem bled for repair or replacement.

As further ob ect the provision of a crank case So formed that it may becast or.

, otherwisev formed in one integral piece, thus preventing leakage n thecrank case which the valve-housing for inclosing the inlet and outletvalves of the pump.

trio for operating the piston to thereby secure steadiness of operationand strength,

provide the piston with guide members embracing the eccentric shaft andthe ecccntrio, and holding the piston from lateral motion and in properalinement with the cylinder, thus securing greater efficiency anddurability of 'thepurnp by reducing friction and strain. I

Still another object of the invention is to so construct the pump thatthe stroke of the piston maybe relatively long in proportion to thediameter thereof, thus reducing strain and tending to permit very freeoperation of the piston with a relatively high efficiency. I

Ea'till another object is to so construct the eccentric and the shaftthat the eccentric may be forced or pressed on the shaft, and so thatthe eccentric and shaftmay be read ilyassembled in a crank case cast orformed in one piece.

Still another object is to provide the crank case with oppositelydisposed air inlet open- Still another object is to provide means Iwhereby the pump may be readily operatively connected to a driving gearwheel or disconnected therefrom, and provide a ship-; per lever for thispurpose and novel means fcrholding the shipper lever in its adjustedpositions.

Other objectswill appear in the course of the following description.

My invention is illustrated in the accompanying drawings, wherein Figurel is a side elevation of my improved the pump; Fig. Qis a verticalsection on the line 2-2 of Fig. 3; Fig. 3 is a vertical section on theline 3-3.0f Fig. 2; Fig. 4

is a fragmentary section through the arm 42 and the shipper lever; Fig.5 is a fragmentary section showing one of the air openings in the crankcase and its cap elevated.

Corresponding and like parts are referred to in the followingdescription and designated in all parts of the accompanying drawings bylike reference numerals.

Referring to the drawings, 2 designates generally the'crank case of myimproved pump. This case'has the form of a partial cylinder closed atits ends by means of the walls 3 and having a base 4. One end wall 3 isprovided with an inwardly projecting annular flange 5 and the other endwall is provided with an inwardly projecting flange 5 and an outwardlyprojecting flange 6.

Bearing sleeves 7 are disposed in these openings surrounded by the Walls5 and 6, and mounted in these bearing sleeves is the shaft 8. I

The upper end of the crank case is open and is formed with an annularflange 9 forming an annular seat for the cylinder 10. This cylinder 10is secured to the crank case in any suitable manner, and is formed atits upper end with an integral valve housing 11. This valve housing iscast with the cylinder and afterward milled out to provide an air inletassas e 12 and an air outlet )assa e 13. o l

and to form a passage for a valve stem 18 and the valve seat 20, the airpassage'lQ is milled out only for a portion of the depth 8* is theeccentric 25.

of the valve housing and the web left is drilled out as at 12 to formholes permitting the passage of air. and yet allowing suiiicient of theoriginal casting to remain to form a spider supporting the centralannular guide 14. The valve passage 13 at its upper end is slightlyflared and interiorly screw threaded, thedower end of the valve passage13 being contracted to form a valve seat.

A ball valve 15 normally rests upon this valve seat and is held in placeby a spring 16, in turn held in position by en aging against the wall ofthe flared orifice ormed in the lower end of an elbow 17, this elbowbeing exteriorly screw threaded at opposite ends, one of these endsengaging the screw threads of the valve passage 13, the other beingadapted to be connected to any suitable tubular conductor through whichthe compressed air may be carried to the point where it is desired tohouse it.

Mounted within the annulus 14 is a valve spindle 18 carrying at itslower end a valve 19 seating upward against the valve seat 20 formed atthe lower end of the wall surrounding the passage 12. A coiled spring 21surrounds the annulus 14 and at its lower end bears against the spidersupporting this annulus, and at its upper end ears against the washer 22carried upon the end of the spindle 18 and held in place by a pin :23.The upper end of the air passage 12 is partially closed or covered bymeans of a cap 24 which is spaced from the upper end of the Wall of thevalve passage to admit air, but protects the valve passage, and thevalve .therein from the lodgment of dirt and dust.

Mounted in the bearings formed in the crank case is the shaft 8, aspreviously stated, and keyed upon this shaft by a key Mounted upon theeccentric and of course surrounding the same, is an eccentric ring orband 26 which has formed with it the radially projecting lug 21. Thislug is perforated for the passage of the wrist pin 28, this wrist pinbeing held in place by means of a set screw entering the lug 27.

The piston 29 may be of any suitable construction, but is formed withthe wardly projecting laterally spaced members 30 which are verticallyslotted as at 3 1 so as to provide four depending guide fingers 32. Theslot 31 is of a size just sufiicient to receive shaft 8, so that thewalls of the slots 31 will be guided against the shaft 8. The members 30are spaced apart, as illustrated in Fig. 3, a distance just suiiicientto receive between them the eccentric and the eccentric ring.Furthermore, it will be seen from Fig. 3 that the outer faces of thesemembers 30 have sliding engagement with-and are guided by the inwardlyextending annular flanges 5. By this construction the depending members30 are so supported that down- 'these depending members will beprevented lation to the longitudinal axis 0' the cylinder 10, and thepiston will be prevented from unequal wear and thus reduce friction.

and strain. Preferably the members 30 are formed integral with the bodyof the piston.

It will be noted from Fig. 3 that the upwardl extending walls of thecrank case are pr'ovi ed with the inwardly extending flanges 33, andthat these flanges, together with the flanges 9, su port an annulusofrfelt or other suitab e material, designated 34. These flanges formbafiies which tend to keep the oil within the crank case. The feltwasher or pad'34 will absorb any small quantities of oil which thebaflies have failed to keep in the crank case,

and thus this felt ring or washer 34 is kept u When the slightly moistwith bricant. plston is lowered it contacts with this compressible ringor washer 34, and the oil from the washer is forced' outward at the extremrty of the suction stroke of the piston,

thus providing for the proper lubrication and which retained in positionwill depend upon the direction of movement of the eccentric, that capbeing retained to close the opening 35 which if removed would permit theoil to be thrown out through the opening 35 upon the rotation of theeccentric. The lower end of the crank case is provided. with an oil cupdesignated 37. This is the only portion of the pump where it isnecessary to introduce the lubricant, and this oil cup also provides foroverflow and prevents an excess of oil from [lowing from the crank case.The caps 36 are held in position by screws 36" and when it is desired toelevate one of the caps, washers '36" are disposed between the cap andthe face of the crank "case.

memes the groove 40 in a manner well known in the art. When the shipperlever is in the position shown in Fig. l, the gear wheel 38 is broughtinto engagement with a driving gear wheel 44 which may be driven in anysuitable manner from the. engine of an automobile,'and when the upperend of the shipper lever is moved to the right in Fig. 1 it' will shiftthe lever out of said engagement. F or the purpose of holding theshipper lever in either one of its adjusted positions the shipper leveris formed with a tooth or lug-'45, as illustrated in Fig. i. andattached to the thickened inner end of the arm 42 is a spring 46, theextremity of which is formed with two downwardly divergent corrugations47 with which the lug or tooth 45 is adapted to respectively engagetohold the lever in its two adjusted positions. 01 course, I do not wishto be limited to shifting the gear wheel 38, as a clutch might be usedfor engaging the gear wheel 38 with the shaft 8 and the gear wheel becontinuously rotated by the wheel 44. I, however, prefer to shift thegear wheel 38 entirely out of engagement with the gear wheel 44, thuseliminating friction and conserving the power otherwise necessary todrive the wheel 38. As shown clearly in Fig. l, the cylinder 10 is helupon the crank case by means of screws 48 which pass downward throughears 49 formed upon the base of the cylinder and en ering upon the sidewalls of the crank case.

The advantages of my invention reside in the extreme simplicity of thepump, and the fact that there are few parts in its construc tion.

A further advantage resides in the forming of the crank case in oneintegral piece instead of a plurality of pieces. This tends tostrengthen the crank case, renders it more durable renders it cheaper tomake, and prevents the leakage of oil and dispenses with the necessityof packing the joints of the several sections with the'consequentdisadvantages due thereto.

Another particularly important element of myinvention consists in theprovision of the four fingers or guides 32 which serve to prevent thelateral motionof the depending portion of the piston. These fingers orguides prevent what is known as the slap of by keeping the motionentirely in a rectilinear direction, thus preventing the wear andweakening of the device from the side motion which would result withoutthese guides. \V1thout these guides the wear re sulting from thispressure or slap will tend to produce leakage of the air with the conesponding inefficiency of the pump.

It is also to be noted that the pump may be very readily assembled. Withthe cylinder removed, the eccentric will be pressed on to the shaft inthe crank case and the piston then dropped over the eccentric andfastened in position by pin 28. Thus the device may be assembled'withina crank case composed of a single piece. It is obvious alsothat theparts of the pump may be readily disassembled. The cylinder is firstdisconnected from the crank case; the 'pin connecting the piston to theeccentric strap is then disconnected from the eccentric, the key 8removed, the shaft drawn out endwise, and the eccentric strap removedfromthe crank case. The cylinder may be readily removed from the crankcase and replaced in a position again without any danger-of losing thealinement of the piston with cmfresponding ill results. By removing thecylinder, the -valve may be readily removed for grinding Anotherimportant feature which may be here noted is that as the cylinder is inone piece andas the opening through the guide 14 is milled out at thesame time that the valve seat is formed, there is always perfectalinement of the valve with the valve seat and no chance fordisalii'iement with its resulting imperfect fitting of the valve on 1the valve seat were the key for the stem 18 made in a separate piecefitted on to the cylinder.

While I have illustrated what I believe to be the preferable form of myinvention, I wish it understood that many minor changes may be madewithout departing from the spirit of the invention as defined by theappended claims.

Having described my invention. what I claim is:

1. In a tire pump, a crank case, a cylinder detachably mounted upon thecrank case, a shaft passing through. the crank case. a piston havinglaterally disposed parallel depending spaced members limgitudinallyslotted to embrace the shaft, the slots opening at the lower ends of themembers, where-- by said depending members may be dropped into positionover the shaft when the cylin der is removed, and an actuating membermounted on the shaft and disposed between said spaced members andoperatively connected with the piston.

:2. In a tire pump, a crank case, a cylinder detachably mounted upon thecrank case, transverse shafts extending through the crank case. a pistonhaving laterally disposed parallel depending spaced members, each memberbeing longitudinally slotted to embrace the shaft, the slots opening atthe lower ends of said members whereby to permit the members to bedropped into position over the shaft when the cylinder is removed, theside walls of the crank case haw ing inwardly projecting portions withwhich said members have sliding contact to 39 thereby guide the saidmembers and prevent lateral movement of the piston, and an actuatingmember disposed on the shaft and between said depending members andoperatively engaged with the piston.

3. In a tire pump, a crank casing having inwardly projecting annularoppositely disposed flanges, a shaft having bearing in said flanges, apiston operating in the cylinder and having oppositely disposed spacedparallel depending members, each slotted to snugly embrace the shaft,the outer faces of said members having sliding contact with the ends ofthe annular flanges, and an actuating member disposed on the shaft andbetween said depending members and operativelv engaged with the piston.

4. In a tire pump, a crank case having oppositely disposed inwardlyprojecting annular bearing flanges, a shaft mounted therein, a cylinderon the crank case, a pis ton operating therein, and four dependingfingers spaced from each other, there being a pair of fingers on eachside spaced from each other to snugly embrace the shaft, the outer facesof the oppositely disposed pairs of fingers having sliding engagementwith the inner ends of the bearing flanges on the crank case, and anactuating member mounted upon the shaft and disposed between said mensesfingers and operatively connected at its upper end to the piston.

5.In a tire pump, a crank case having oppositely disposed inwardlyprojecting annular bearing flanges, a cylinder mounted upon the crankcase, a piston therein having oppositelvdisposed depending spacedmembers, each of said members being longitudinally slotted, a shaftpassing through the bearings of the crank case and snugly disposed onsaid slots of the depending members, the outer faces of the dependingmembers having sliding engagement with the ends of the annularbearing'fianges, an eccentric disposed upon the shaft and having itsside faces slidingly engaging the inner faces of the depending members,a

ring carried upon the eccentric and like Wise having its side facesslidingly engag ing the inner faces of the depending members, said ringhaving an extension pivotally connected to the outer ends of thedepending members.

In testimony whereof I hereunto aflix my signature in the presence oftwo Witnesses.

HARRY W. LOCKLEY.

Witnesses MARJORIE A. SMITH, ELsIn W, NIOKUM.

